Infusion pump and infusion pump bubble detection method

Abstract

An embodiment of the present application discloses an infusion pump and a bubble detection method for the infusion pump; after the infusion pump is powered on, the infusion pump emits ultrasonic waves and collects corresponding ultrasonic signals, determines adjustment information of the ultrasonic drive circuit and / or the ultrasonic detection circuit, adjusts the ultrasonic drive circuit and / or the ultrasonic detection circuit according to the adjustment information, determines the bubble state in the infusion tube according to the ultrasonic signal collected after the adjustment and the bubble threshold, and outputs bubble volume information and / or bubble alarm information according to the bubble state.

Description

Technical Field

[0001] The present application relates to the field of medical technology, and in particular to an infusion pump and a method for detecting bubbles in an infusion pump. Background Art

[0002] Existing infusion pump manufacturers typically pre-set relevant parameters (such as gain) corresponding to the characteristics of specific infusion tube consumables within the infusion pump, and the infusion pump can then perform bubble detection on the specific infusion tube consumable based on the pre-set relevant parameters. However, infusion pumps with pre-set relevant parameters are limited to bubble detection for specific infusion tube consumables. When the infusion pump needs to support different types of consumables, due to the different diameters of infusion tubes of different categories or brands, if bubble detection is performed on other different types of infusion tube consumables based on the pre-set relevant parameters, the bubble detection device may not be able to accurately detect bubbles in the infusion tube, resulting in missed or false detection of bubbles. Summary of the Invention

[0003] The embodiments of the present application provide an infusion pump and an infusion pump bubble detection method, which can be adapted to bubble detection in different types of infusion tubes to reduce missed or false bubble detections.

[0004] According to a first aspect of an embodiment of the present application, there is provided an infusion pump, which is used in conjunction with an infusion tube. The infusion pump comprises a peristaltic extrusion mechanism, a processor, and an ultrasonic sensor assembly, wherein the ultrasonic sensor assembly comprises an ultrasonic sensor transmitting end, an ultrasonic sensor receiving end, an ultrasonic driving circuit, and an ultrasonic detection circuit; the peristaltic extrusion mechanism comprises a driving mechanism and a pump plate group; the processor is connected to the ultrasonic sensor transmitting end through the ultrasonic driving circuit to control the ultrasonic sensor transmitting end to transmit ultrasonic waves; the processor is connected to the ultrasonic sensor receiving end through the ultrasonic detection circuit to receive an ultrasonic signal collected by the ultrasonic sensor receiving end and formed by signal processing by the ultrasonic detection circuit; under the control of the processor, the driving mechanism drives the pump plate group to squeeze the infusion tube arranged along the infusion tube groove of the infusion pump, so that the liquid in the infusion tube moves in a preset direction;

[0005] The processor is used to emit ultrasonic waves and collect corresponding ultrasonic signals after the infusion pump is powered on, determine adjustment information of the ultrasonic drive circuit and / or the ultrasonic detection circuit, adjust the ultrasonic drive circuit and / or the ultrasonic detection circuit according to the adjustment information, determine the bubble status in the infusion tube based on the ultrasonic signals collected after adjustment and the bubble threshold, and output bubble volume information and / or bubble alarm information according to the bubble status.

[0006] A second aspect of an embodiment of the present application provides an infusion pump bubble detection method, the method being applied to an infusion pump, the infusion pump being used in conjunction with an infusion tube, the infusion pump comprising a peristaltic extrusion mechanism, a processor, and an ultrasonic sensor assembly, the ultrasonic sensor assembly comprising an ultrasonic sensor transmitter, an ultrasonic sensor receiver, an ultrasonic drive circuit, and an ultrasonic detection circuit; the peristaltic extrusion mechanism comprising a drive mechanism and a pump plate group; the processor being connected to the ultrasonic sensor transmitter via the ultrasonic drive circuit to control the ultrasonic sensor transmitter to emit ultrasonic waves, the processor being connected to the ultrasonic sensor receiver via the ultrasonic detection circuit to receive ultrasonic signals collected by the ultrasonic sensor receiver and generated by signal processing by the ultrasonic detection circuit; the drive mechanism, under the control of the processor, drives the pump plate group to squeeze the infusion tube arranged along the infusion tube groove of the infusion pump, so that the liquid in the infusion tube moves in a preset direction, the method comprising:

[0007] Power on the infusion pump;

[0008] Transmitting ultrasonic waves and collecting corresponding ultrasonic signals;

[0009] determining adjustment information of the ultrasonic driving circuit and / or the ultrasonic detection circuit;

[0010] adjusting the ultrasonic driving circuit and / or the ultrasonic detection circuit according to the adjustment information;

[0011] determining the state of bubbles in the infusion tube according to the ultrasonic signal collected after adjustment and the bubble threshold;

[0012] Bubble volume information and / or bubble alarm information is output according to the bubble state.

[0013] The above-mentioned infusion pump and infusion pump bubble detection method determine the adjustment information of the ultrasonic driving circuit and / or the ultrasonic detection circuit by determining the ultrasonic signal received after the infusion pump is powered on, and then adjust the ultrasonic driving circuit and / or the ultrasonic detection circuit according to the adjustment information, so that the ultrasonic signal collected after the adjustment is adapted to the infusion tube consumables currently used, thereby reducing the influence of the infusion tube consumables on the output amplitude of the ultrasonic signal when the infusion pump uses different infusion tube consumables, realizing adaptive control of the ultrasonic signal, strong real-time performance, and effectively solving the problems of missed detection and false detection of bubbles caused by different infusion tube consumables. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0015] Figure 1 This is a flowchart of the steps of the infusion pump bubble detection method in one embodiment of the present application.

[0016] Figure 2 It is a structural diagram of an infusion pump in one embodiment of the present application.

[0017] Figure 3 It is a structural diagram of an infusion pump in another embodiment of the present application.

[0018] Figure 4 Schematic diagram of an ultrasonic sensor transmitting and receiving ultrasonic signals in one embodiment of the present application.

[0019] Figure 5 This is a hardware structure block diagram of a medical device in one embodiment of the present application.

[0020] Figure 6 This is a schematic diagram of the layout of the peristaltic extrusion mechanism and the infusion tube in one embodiment of the application.

[0021] Figure 7 This is a hardware structure block diagram of an infusion pump in one embodiment of the present application.

[0022] Figure 8 It is a schematic diagram of the bubble type in one embodiment of the present application.

[0023] Figure 9 This is a schematic diagram of the bubble type in another embodiment of the present application.

[0024] Figure 10 This is a schematic diagram of the bubble type in another embodiment of the present application.

[0025] Figure 11 Schematic diagram of output amplitudes of different types of infusion tubes in one embodiment of the present application.

[0026] Figure 12 Schematic diagram of the relationship between output amplitudes corresponding to different transmission frequencies in an embodiment of the present application.

[0027] Figure 13 Schematic diagram of the change in output amplitude corresponding to different bubble categories in one embodiment of the present application.

[0028] Figure 14 This is a flow chart of a bubble detection method for an infusion pump in one embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] The terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish between different objects, not to describe a particular order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0031] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] The following is a detailed introduction to the embodiments of the present application.

[0033] See also Figure 1 , shown is a flowchart of the steps of the infusion pump bubble detection method in one embodiment of the present application. The infusion pump bubble detection method includes the following steps:

[0034] Step S100: power on the infusion pump.

[0035] Please also refer to Figure 2 and Figure 3 , which is a schematic diagram of the structure of an infusion pump according to an embodiment of the present application. The infusion pump 20 includes a pump body 210, a display system 160, a peristaltic extrusion mechanism 200 (shown in FIG. Figure 6 ), the infusion tube groove 205, the ultrasonic sensor assembly 230 and the pump door 212, and the pump door 212 is movably mounted on the pump body 210 to shield the infusion tube groove 205 for mounting the infusion tube 40 (such as Figure 2 When the user opens the pump door 212, the infusion tube groove 205 (as shown) for installing the infusion tube 40 can be exposed. Figure 3 The pump door 212 has a front surface facing the user (external), a side surface for mating with a mounting dock, and a top surface and a bottom surface for facing other infusion pumps (including but not limited to infusion pumps and syringe pumps) in a stacked arrangement.

[0036] In some embodiments, the display system 160 is disposed on the pump door 212 and extends from the left side of the front centerline of the pump door 212 to the right side of the front centerline of the pump door. The width of the display system 160 is greater than its height, and the display system 160 is disposed on the pump door in an elongated strip shape. Specifically, the width of the display system 160 can be greater than or equal to 70% of the front width of the pump door 212, and the height of the display system 160 can be greater than or equal to 60% of the front height of the pump door 212. Alternatively, the area of ​​the display system 160 can be greater than or equal to two-thirds of the front area of ​​the pump door 212. When the pump door 212 has a transverse dimension greater than its longitudinal dimension, i.e., when the width is greater than the height, the width of the display system 160 is greater than its height, thereby providing a larger display area and making the display system 160 appear as a transversely long rectangle. The pump door 212 also includes physical input keys 214 disposed on one side of the display system. For example, the physical input keys 214 can be partially or entirely located on the right, top, bottom, or left side of the display system. A user can enter data or commands using the physical input keys 214. When the display screen of the display system 160 is a touch screen, the user can also input data or instructions through the touch screen. Of course, the setting of the physical input key 214 can be used in an emergency situation. If the touch screen fails and infusion control cannot be performed, the user can use the physical input key 214 to control the infusion, thereby ensuring the safety of the infusion pump.

[0037] In some embodiments, the display system 160 includes two or more display screens, at least one of which is composed of a touch layer and a display layer stacked together, while the remaining display screens may also consist solely of a display layer. Of course, to achieve a better touch experience for the user, where what you touch is what you get, the display screens included in the display system 160 are all composed of a touch layer and a display layer stacked together.

[0038] Please also refer to Figure 5, shown is a hardware block diagram of an infusion pump in one embodiment of the present application. The infusion pump 100 includes components such as a control platform 102, a memory 104, a power system 106, an input / output (I / O) system 108, an RF circuit 120, an external port 122, an audio circuit 124, a monitoring circuit 126, a protection circuit 128, a detection circuit 129, a power drive circuit 130, a drop count sensor 132, a bubble sensor 134, a pressure sensor 136, a temperature sensor 138, and an optical sensor 139. These components communicate via one or more communication buses or signal lines 101. Among them, the control platform 102 includes a processor 150 and a peripheral device interface 152.

[0039] The infusion pump 100 can be an infusion pump that performs the infusion operation set by the user according to the liquid configured by the user, or an infusion pump 20 that controllably inputs the configured liquid medicine into the patient's body, or other medical equipment. The components of the infusion pump 20 can be compared to Figure 5 It should be understood that the present invention may be shown to have more or fewer components, or to have a different configuration of components. Figure 5 The infusion pump 100 shown is only an example and the components of the infusion pump 100 may be different. Figure 5 More or fewer components, or a different configuration of components may be shown. Figure 5 The various components described may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application specific integrated circuits.

[0040] The memory 104 may include high-speed random access memory and may also include non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state storage devices. In some embodiments, the memory 104 may also include memory remote from the one or more processors / controllers 150, for example, a network attached memory accessed via the RF circuit 120 or the external port 122 and a communication network (not shown), wherein the communication network may be the Internet, one or more intranets, a local area network (LAN), a wide area network (WLAN), a storage area network (SAN), etc., or a suitable combination thereof. The processor 150 may control access to the memory 104 by other components of the infusion pump 100 other than the peripheral device interface 152 to perform detection functions or other functions.

[0041] The peripheral device interface 152 couples the input and output peripherals of the infusion pump 100 to the processor / controller 150 and the memory 104. For example, the peripheral device interface 152 may include an input interface and an output interface. The one or more processors / controllers 150 run various software programs and / or instruction sets stored in the memory 104 to perform various functions of the infusion pump 100 and process data.

[0042] In some embodiments, the peripheral device interface 152 and the processor / controller 150 can be implemented on a single chip. In another embodiment, they can be implemented on multiple separate chips. The processor 150 can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0043] The RF (radio frequency) circuit 120 receives and transmits electromagnetic waves. The RF circuit 120 converts electrical signals into electromagnetic waves, or vice versa, and communicates with a communication network and other communication devices via the electromagnetic waves. The RF circuit 120 may include well-known circuits for performing these functions, including but not limited to an antenna system 156, an RF transceiver, one or more amplifiers, a tuner, one or more oscillators, a digital signal processor, a CODEC chipset, a subscriber identity module (SIM) card, memory, etc. The RF circuit 120 may communicate with a network and other devices via wireless communications, such as the World Wide Web (WWW), an intranet, and / or a wireless network such as a cellular telephone network, a wireless local area network (LAN), and / or a metropolitan area network (MAN). The wireless communication may use any of a variety of communication standards, protocols, and technologies, including, but not limited to, Global System for Mobile Communications (GSM), Enhanced Data GSM Environment (EDGE), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Bluetooth (e.g., IEEE802.15.1), Wireless Fidelity (WIFI) (e.g., IEEE802.11a, IEEE 802.11b, IEEE802.11g, and / or IEEE802.11n), Voice over Internet Protocol (VoIP), Wi-MAX, protocols for email, instant messaging, and / or Short Message Service (SMS), or any other suitable communication protocol, including communication protocols that have not yet been developed as of the filing date of this document.

[0044] The external port 122 provides a wired communication interface between the infusion pump 100, other devices (e.g., a dock, a central station, a monitor, etc.), or a user (e.g., a computer or other communication device). In one embodiment, the external port 122 may be a communication interface controlled by a CAN bus protocol, a communication interface controlled by a serial communication protocol (e.g., RS485, RS232), or a universal serial bus (USB). The external port 122 is suitable for coupling to other devices or users directly or indirectly via a network (e.g., the Internet, a local area network, etc.).

[0045] The audio circuit 124 and the speaker 154 provide an audio interface between the user and the infusion pump 100. The audio circuit 124 receives audio data output from the peripheral device interface 152 through the output interface, converts the audio data into electrical signals, and transmits the electrical signals to the speaker 154. The speaker 154 converts the electrical signals into sound waves perceptible to humans.

[0046] The monitoring circuitry 126 may include fault detection circuitry to indicate the status of one or more of the processors / controllers 150 .

[0047] The protection circuit 128 may include hardware protection devices (such as fuses, TVS diodes) for protecting the electrical safety of various components within the infusion pump 100. The processing / controller 150 controls the power device 208 (shown in FIG. 1 ) of the infusion pump 100 through the power drive circuit 130. Figure 6 ) is driven by the processor / controller 150, so that the power device moves in a controllable manner under the drive of the processor / controller 150, and during the movement, the controlled object (for example, the pump door 112, the liquid stop clamp) is driven to move through one or more force transmission / conversion devices (such as gears or transmission shafts). The power device can be an electromagnetic device that realizes electrical energy conversion or transmission based on the law of electromagnetic induction, such as a permanent magnet (PM) motor, a reactive (VR) motor, and a hybrid (HB) motor. In one embodiment, the motor, under the drive of the processor / controller 150, drives the controlled object of the infusion pump 100 to move, so that the controlled object achieves a preset motion state.

[0048] In some embodiments, the drop count sensor 132 can be used in conjunction with the drip pot of the infusion tube 40 to detect the drop flow rate or flow rate in the drip pot.

[0049] In some embodiments, one or more bubble sensors 134 are used to detect the presence and size of gas in the infusion tube 40. The bubble sensor 134 may be an ultrasonic sensor 230 or an infrared sensor.

[0050] In one embodiment, the pressure sensor 136 can respond to the pressure value of the object being measured (such as the wall of the infusion tube 40) and convert the pressure value into a detectable electrical signal and send it to the control platform 102. The pressure sensor 136 can be a resistance strain gauge pressure sensor, a semiconductor strain gauge pressure sensor, a piezoresistive pressure sensor, an inductive pressure sensor, a capacitive pressure sensor, a resonant pressure sensor, a fiber optic pressure sensor, or a capacitive accelerometer.

[0051] In one embodiment, the infusion pump 100 has a heating device for heating the liquid in a container such as a medicine bag. In this case, the temperature sensor 138 can be used to detect the real-time temperature of the liquid; at the same time, the temperature value is converted into a detectable electrical signal and sent to the control platform 102. The control platform 102 can display the real-time temperature through the display system 160, and can also control the heating device on / off according to the temperature value.

[0052] In some embodiments, the optical sensor 139 may be disposed at a preset position of the infusion tube 40 to detect liquid level information within the infusion tube 40 at the preset position. At the preset position, if the processor / controller 150 detects first status information via the optical sensor 139, it indicates that liquid is present within the infusion tube 40 at the preset position, i.e., the liquid level within the infusion tube 40 is not lower than the preset position. If the processor / controller 150 detects second status information via the optical sensor 139, it indicates that the liquid level within the infusion tube 40 at the preset position has dropped below the preset position, i.e., gas has passed through the infusion tube 40 at the preset position, and the liquid level within the infusion bag has dropped to or below the preset position.

[0053] The input / output (I / O) system 108 provides an interface between the input / output peripherals of the infusion pump 100 and the peripheral device interface 152. The input / output peripherals may be a display system 160, a position sensor 164, a displacement sensor 166, a lighting assembly 168, and other input / control devices 162. The I / O system 108 may include a display controller 140, a position sensor controller 144, a proximity sensor controller 146, a lighting controller 148, and one or more input controllers 142. One or more controllers in the I / O system 108 receive / send electrical signals from / to the input / output peripherals. Among them, one or more input controllers 142 receive / send electrical signals from / to other input / control devices 162. The other input / control devices 162 may include physical buttons (e.g., push buttons, rocker buttons, or touch buttons, etc.), slider switches, joysticks, etc. Other input / control devices 162 may include a physical button for emergency stopping of infusion, a power button for powering on the infusion pump, and a start button for starting infusion by the infusion pump.

[0054] In one embodiment, the display system 160 may include a display screen 161 (shown in FIG. Figure 6 ), the display system 160 provides an output interface between the infusion pump 100 and the user, displaying electronic files on a screen through a specific transmission device and then reflecting them to the human eye; the display system 160 may include a cathode ray tube display (CRT), a plasma display PDP, or a liquid crystal display LCD, etc. In some embodiments, the display system 160 may include a touch screen, which provides an input / output interface between the infusion pump 10 and the user; the touch screen may include a resistive screen, a surface acoustic wave screen, an infrared touch screen, an optical touch screen, a capacitive screen, or a nanofilm, etc., which is an inductive display device that can receive input signals such as contacts. Whether it is a display screen or a display screen with a touch screen, visual output can be displayed to the user, such as displaying visual output to the user through the output interface in the peripheral device interface 152. The visual output optionally includes graphics, text, charts, videos, and combinations thereof. Some or all of the visual output may correspond to user interface objects, which will be described in more detail herein.

[0055] The touch screen also accepts user input based on touch and / or contact. The touch screen forms a touch-sensitive surface that receives user input. The touch screen and display controller 140 (together with any associated modules and / or instruction sets in the memory 104) detect contact on the touch screen (and any movement or interruption of the touch) and convert the detected contact into interaction with a user interface object such as one or more soft keys displayed on the touch screen. In one embodiment, the point of contact between the touch screen and the user corresponds to one or more fingers of the user. The touch screen may use LCD (liquid crystal display) technology or LPD (light emitting polymer display) technology, but other display technologies may be used in other embodiments. The touch screen display and display controller 140 may use any of a variety of touch-sensitive technologies to detect contact and its movement or interruption, including but not limited to capacitive, resistive, infrared and surface acoustic wave technologies, as well as other proximity sensor arrays, or other technologies for determining one or more points of contact with the touch screen display.

[0056] Position sensor 164 can sense the position of a measured object, convert the position into a detectable electrical signal, and transmit the electrical signal to control platform 102 via I / O system 108. Position sensor 164 can be a contact sensor that generates a signal when two objects come into contact and squeeze, such as a limit switch or a two-dimensional matrix position sensor. Alternatively, it can be a proximity sensor that generates a signal when two objects approach a predetermined distance, such as an electromagnetic, photoelectric, differential transformer, eddy current, capacitor, reed switch, ultrasonic, or Hall effect sensor. The measured object can include a pump door, an infusion tube, or the like. In some embodiments, a Hall effect position sensor can be used to detect the position of the pump door.

[0057] In certain embodiments, the control platform 102 can sense whether the infusion tube 40 is installed in the infusion tube groove 205 via the position sensor 164. If the position sensor 164 detects the infusion tube 40 within the detection position of the position sensor 164, the control platform 102 drives the stop clamp to open, causing the stop clamp to release the infusion tube 40. Specifically, the infusion pump 20 is provided with a front-end detection device, wherein the front-end detection device may include one, two, or more position sensors 164. For example, when a position sensor is installed at a position in the infusion tube groove 205 of the infusion pump 20, if the processor of the infusion pump 20 detects that the position sensor at that position transmits a feedback signal, it determines that the infusion tube 40 is installed in the infusion pump 20. When a position sensor is installed at a first target position in the infusion tube groove 205 and a position sensor is installed at a second target position, and both position sensors detect and transmit feedback information, it is determined that the infusion tube 40 is installed in the infusion pump 20. When at least one position sensor 164 detects that the wall of the infusion tube 40 is not in contact with the infusion tube groove 205, the control platform 102 can drive the stop clamp to open. The infusion tube groove 205 refers to the location in the infusion pump where the infusion tube is installed.

[0058] The displacement sensor 166 can respond to changes in the position of the object being measured relative to a reference position, convert the position changes into detectable electrical signals, and transmit the electrical signals to the control platform 102 via the I / O system 108. The displacement sensor 106 can be inductive, capacitive, ultrasonic, or Hall effect.

[0059] The light assembly 168 may include a visual alarm element for indicating that the infusion pump 100 is in an abnormal state. The light assembly 168 responds independently to the drive of the processor / controller 150; the light assembly 168 may also cooperate with the speaker 154 to respond to the drive of the processor / controller 150, for example, the color or brightness of the light changes with the tone and frequency of the alarm sound. The light assembly 168 may include indicator lights for components such as the power supply and CPU, or an infusion fault status alarm light. The light assembly 168 may also include a visual lighting element for facilitating observation of the structure or component status of the infusion pump 100 when the ambient light is poor.

[0060] The infusion pump 100 also includes a power system 106 for powering various components. The power system 106 may include a power management system, one or more power sources (e.g., batteries or alternating current (AC)), a charging system, power failure detection circuitry, a power converter or inverter, a power status indicator (e.g., a light emitting diode (LED)), and any other components associated with power generation, management, and distribution.

[0061] In one embodiment, the software components include an operating system 170, a communication module (or instruction set) 172, a touch module (or instruction set) 174, a tactile feedback module (or instruction set) 176, a motion module (or instruction set) 178, a position module (or instruction set) 180, a graphics module (or instruction set) 182, a text input module (or instruction set) 190, a device / global internal state (or instruction set) 192, and one or more applications (instruction sets) 194.

[0062] The operating system 170 (such as an embedded operating system such as Darwin, RTXC, LINUX, UNIX, OS, WINDOWS, etc.) includes various software components and / or drivers for controlling and managing routine system tasks (such as memory management, storage device control, or power management, etc.), as well as facilitating communication between various software and hardware components.

[0063] The communication module 172 facilitates communication with other devices via one or more external ports 122 , and it also includes various software components for processing data received by the RF circuitry 120 and / or the external ports 122 .

[0064] In one embodiment, the touch module 174 can selectively detect contact with the display system 160 or other touch-sensitive devices (e.g., touch buttons, touchpads). For example, the touch module 174 detects contact with the display system 160 in conjunction with the display controller 140. The touch module 174 includes various software components for performing various operations associated with detecting contact with the display system 160 (which can be via a finger or stylus, etc.), such as determining whether contact has occurred (e.g., detecting the time a finger is pressed), determining the strength of the contact (e.g., the force or pressure of the contact), determining whether the contact has moved (e.g., detecting one or more finger drag events), or tracking movement on the display screen and determining whether the contact has stopped (e.g., detecting the time a finger is lifted or the contact is disconnected). The operation of determining the movement of the contact point may include determining the rate (signal amplitude), velocity (signal amplitude and direction), and / or acceleration (including signal amplitude and / or direction) of the contact point. These operations can be applied to single-point contact or multiple simultaneous points of contact. In one embodiment, the touch module 174 detects contact with other touch devices in conjunction with the display controller 140.

[0065] The touch module 174 can be used to detect gesture input by the user. Different gestures of the user on the touch-sensitive device have different contact patterns (for example, one or more combinations of the location, time or intensity of the contact are detected). For example, detecting a single-finger tap gesture includes detecting a finger press event and then detecting a finger lift event at the same or similar location as the finger press event. For example, detecting a finger swipe gesture on the surface of the touch device includes detecting a finger press event, then monitoring one or more finger drag events, and then detecting a finger lift event. Similarly, taps, swipes, drags and other gestures of the touch pen are optionally detected by detecting a specific contact pattern of the touch pen.

[0066] The tactile feedback module 176 includes various software components for generating instructions to generate tactile outputs at one or more locations of the infusion pump 10 using one or more tactile output generators (not shown) in response to user interaction with the infusion pump 10. For example, after detecting contact on the surface of a touch device, the color of graphics or text on the touch device changes, or a sound or vibration is generated.

[0067] Location module 180 includes software components for performing various operations related to detecting device location and detecting changes in device location.

[0068] The graphics module 182 includes various known software components for rendering or displaying graphics on the display screen of the display system 160 or other external devices, including components for changing the visual impact of the displayed graphics (such as brightness, transparency, saturation, contrast or other visual attributes). In the embodiments of this document, the term "graphics" includes any object that can be displayed to the user, including, but not limited to, text, web pages, icons (such as user interface objects such as soft keys), digital images, videos, animations, etc. In some embodiments, the graphics module 182 stores data representing the graphics to be used. Each graphic can be assigned a corresponding code. The graphics module 182 receives one or more codes for specifying the graphics to be displayed from an application, etc., and also receives coordinate data and other graphic attribute data if necessary, and then generates screen image data for output to the display controller 140.

[0069] The text input module 190 provides various software components for inputting text in one or more applications. Specifically, it can be used to input various infusion parameters, including drug name, infusion rate, or alarm threshold, etc.

[0070] In one embodiment, the memory 104 stores the device / global internal state 192. The device / global internal state 157 includes one or more of the following: an active application state, which indicates which applications (if any) are currently active; a display state, which indicates what applications, views, or other information occupy various areas of the display system 160; a sensor state, which includes information obtained from the device's various sensors and other inputs or controls for the infusion pump 10; and position and / or orientation information regarding the device's position and / or posture.

[0071] In one embodiment, the memory 104 stores at least one application 194, which may include an infusion mode device 194-1, an occlusion pressure level setting 194-2, a bubble level setting 194-3, a medication setting 194-4, a volume setting 194-5, a brightness setting 194-6, a connection setting 195-7, a docking setting 195-8, or a temperature setting 195-9. The infusion mode device 194-1 may include a combination of preset infusion parameters to accommodate different usage scenarios. The occlusion pressure level setting 194-2 may include an interface for a user to input different occlusion pressure levels, which can be used to adjust the occlusion alarm threshold of the infusion pump 10 to accommodate different usage scenarios. The bubble level setting 194-3 may include an interface for a user to input different bubble levels, which can be used to adjust the bubble alarm threshold of the medical device 10 to accommodate different usage scenarios. Among them, the drug setting 194-4 may include an interface for providing users to input different drug names, drug abbreviations and / or drug colors, etc., and the drug parameters before infusion are set by entering the corresponding drug name / abbreviation / color, etc., so as to facilitate automatic confirmation within the infusion pump 100 or verification by medical staff during the infusion process. Among them, the volume setting 194-5 provides users with the ability to adjust the alarm volume and / or the volume of other audio outputs as needed. Among them, the brightness setting 194-6 provides users with the ability to adjust the brightness of the screen, alarm light, lighting, etc. as needed. Among them, the online setting 195-7 provides users with an input interface for controlling whether the infusion pump 100 and other devices are online, the online working mode, etc. as needed. Among them, the dock setting 195-8 provides users with an interface for setting the working parameters of the dock (Dock) connected to the infusion pump 100 as needed. Among them, the temperature device 195-9 provides users with an interface for setting the temperature of the liquid in the heated syringe.

[0072] In one embodiment, the user can touch the power button of the infusion pump to cause the power module of the infusion pump to energize at least some of the electrical components in the infusion pump, i.e., power on the infusion pump. Of course, in another embodiment, the user can also power on the infusion pump by wireless control or by directly controlling an external power switch.

[0073] In one embodiment, after the power button of the infusion pump is triggered by the user, the infusion pump uses the position sensor to identify that the infusion tube is accurately installed in the infusion tube slot, and after the various hardware self-tests of the infusion pump are confirmed to be correct, the user can press the start button or the start touch button on the display screen or other related devices (such as DOCK) to enable the processor to send a drive signal to the peristaltic extrusion mechanism to start the infusion. Please refer to the infusion startup process. Figure 6 , shown is a schematic diagram of the layout of the peristaltic extrusion mechanism and the infusion tube in the infusion pump. The peristaltic extrusion mechanism 200 includes a camshaft 202, a pump plate group 204 and an extrusion plate 206. The processor in the infusion pump 20 sends instructions such as speed or position, and drives the drive mechanism 208 (such as a motor) through the power drive circuit 130 to work according to the specified speed and direction. During the rotation process, the drive mechanism 208 drives the camshaft 202 connected thereto to rotate; during the rotation process of the camshaft 202, the pump plate group 204 on the camshaft 202 performs linear reciprocating motion, that is, the pump plates on the pump plate group 204 perform linear reciprocating motion in sequence. The pump plate group 204 cooperates with the extrusion plate 206 to reciprocate and release the outer wall of the infusion tube 40 in sequence, driving the liquid in the infusion tube 40 to continue to flow in a directional manner. A deceleration mechanism can also be provided between the drive mechanism 205 and the camshaft 204 to ensure that the speed of the pump plate group 204 is stable and uniform.

[0074] Step S102: transmit ultrasonic waves and collect corresponding ultrasonic signals.

[0075] See also Figure 3 and Figure 7, which is a schematic diagram of an ultrasonic sensor assembly of an infusion pump in one embodiment of the present application. The ultrasonic sensor assembly 230 includes an ultrasonic transmitter (Tx) 231 and an ultrasonic receiver (Rx) 233, an ultrasonic drive circuit 149, and an ultrasonic detection circuit 139, wherein the ultrasonic transmitter 231 and the ultrasonic receiver 233 are arranged relative to each other. For example, when the ultrasonic sensor 230 is arranged in the pump body 210, the ultrasonic transmitter 231 is arranged on a first side of the infusion tube groove 205, and the ultrasonic receiver 233 is arranged on a second side of the infusion tube groove 205. Furthermore, when the infusion tube 40 is arranged in the infusion tube groove 205, the ultrasonic transmitter 231 and the ultrasonic receiver 233 can contact the infusion tube 40. The processor 150 is connected to the ultrasonic sensor transmitting end 231 via the ultrasonic drive circuit 149. The processor 150 controls the ultrasonic sensor transmitting end 231 to transmit ultrasonic waves by sending drive information to the ultrasonic drive circuit 149. The processor 150 is connected to the ultrasonic sensor receiving end 233 via the ultrasonic detection circuit 139. After the ultrasonic wave transmitted by the ultrasonic transmitting end 231 passes through the infusion tube 40, it is collected by the ultrasonic receiving end 233 and processed by the ultrasonic detection circuit 139 to generate a corresponding ultrasonic signal. The ultrasonic detection circuit 139 includes but is not limited to filtering and / or gain adjustment. In one embodiment, the ultrasonic detection circuit 139 can be integrated on the main control circuit board of the processor 150, that is, the processor 150 can directly receive the ultrasonic signal transmitted by the ultrasonic sensor 230 and perform operations such as gain adjustment on the ultrasonic signal.

[0076] In one embodiment, the ultrasonic sensor 230 may also be other types of sensors, such as a reflective ultrasonic sensor, that is, the ultrasonic transmitting end and the ultrasonic receiving end of the ultrasonic sensor 230 are located on the same side of the infusion tube groove. When the transmitted ultrasonic wave penetrates the infusion tube, the ultrasonic wave is reflected at the interface of different materials, and then the ultrasonic receiving end can receive the reflected ultrasonic wave and obtain an ultrasonic signal based on the reflected ultrasonic wave.

[0077] In one embodiment, during the infusion initiation process, the processor 150 periodically transmits ultrasonic waves and receives corresponding ultrasonic signals through the ultrasonic sensor assembly, and stores at least a portion of the output amplitude of the ultrasonic signal in the memory 104 for use in subsequent steps.

[0078] In one embodiment, the processor 150 activates the ultrasonic sensor assembly to periodically transmit ultrasonic waves and receive corresponding ultrasonic signals after the infusion pump is powered on and infusion operation is initiated, or after the infusion pump is powered on and an infusion tube is recognized to be installed, and utilizes the ultrasonic signals for subsequent applications. In another embodiment, the processor 150 activates the ultrasonic sensor assembly to transmit ultrasonic waves and receive corresponding ultrasonic signals after the infusion pump is powered on, but only utilizes the ultrasonic signals after infusion operation is initiated or after an infusion tube is recognized to be installed for subsequent applications.

[0079] Please also refer to Figure 11 , shown is a schematic diagram of the output amplitudes of different types of infusion tubes in one embodiment of the present application. When the manufacturer performs bubble detection on a preset infusion tube (such as an infusion tube with a diameter of 1), the ultrasonic sensor 230 generates ultrasonic waves at a transmission frequency f0, and the output amplitude position of the ultrasonic signal received by the processor 150 is within the normal range (such as the output amplitude corresponding to the output frequency f0 is within the saturation and too low lines, and is at the empirical value). At this time, the processor 150 can also perform normal bubble detection based on the output amplitude of the ultrasonic signal. In some embodiments, the empirical value of the output amplitude is related to the circuit output range of the ultrasonic sensor. The specific empirical value of the output amplitude can be taken as a value between the saturated output circuit and the too low output voltage. For example, the circuit output range of the ultrasonic sensor is 0.2V~5V, the saturated output voltage is 5V, and the too low output voltage is 0.2V. At this time, the empirical value of the output amplitude can be selected as 2.5V~3V. For example, the circuit output range of the ultrasonic sensor is 0.2V~3.3V. At this time, the saturated output voltage is 3.3V, and the too low output voltage is 0.2V. At this time, the empirical value of the output amplitude can be selected as 2.5V~3V (target value).

[0080] When the infusion tube 10 used by the infusion pump 20 has a thick diameter (such as an infusion tube with a diameter of 2), the ultrasonic sensor 230 generates ultrasonic waves at a transmission frequency f0. At this time, since the driving gain value of the ultrasonic driving circuit or the detection gain value (which can also correspond to the gain) in the ultrasonic detection circuit 139 is preset or fixed, the ultrasonic signal intensity detected by the ultrasonic driving circuit or the ultrasonic detection circuit 139 of the infusion pump 20 may be strong, resulting in saturation of the ultrasonic receiving end signal (such as the output amplitude corresponding to the output frequency f0 exceeds the saturation line). In this case, if there is a bubble passing through the bubble detection ultrasonic sensor, the ultrasonic signal of the ultrasonic receiving end 233 will decrease, but since the ultrasonic receiving end reaches saturation, the intensity of the ultrasonic signal output by the ultrasonic detection circuit 139 may not change, thereby there is a possibility of missing bubble detection, leading to the occurrence of clinical accidents.

[0081] When the infusion tube used in the infusion pump is too thin (such as an infusion tube with a diameter of 3), since the driving gain value of the ultrasonic driving circuit or the detection gain value in the ultrasonic detection circuit 139 (which can also correspond to the gain value) is preset or fixed, this may cause the output amplitude of the ultrasonic signal to be too small (the output amplitude corresponding to the output frequency f0 is near the too low line and far away from the experience value line). In this case, the ultrasonic signal transmitted by the ultrasonic receiving end 233 may be filtered out during the processing of the ultrasonic detection circuit 139, which may lead to missed detection or false detection of bubbles, bringing risks and clinical false alarms to clinical applications, and interfering with the normal use of the infusion pump by medical staff.

[0082] Step S104: Determine adjustment information of the ultrasonic driving circuit and / or the ultrasonic detection circuit.

[0083] In one embodiment, the processor 150 retrieves one or more historical ultrasonic signals (voltage values) generated within a preset time period from the memory 104; for example, eight historical ultrasonic signals received before the current moment may be retrieved; this may also be understood as retrieving ultrasonic signals collected within one or several acquisition cycles before the current moment; this may also be understood as retrieving ultrasonic signals generated within a preset time period (e.g., 20 seconds); and averages the retrieved historical ultrasonic signals to obtain an ultrasonic signal baseline (voltage value). Alternatively, the processor averages one or more historical ultrasonic signals (voltage values) and / or the current ultrasonic signal generated within a preset time period to obtain an ultrasonic signal baseline (voltage value). The preset time period referred to herein may include a time period before the current moment or a time period including the current moment, so the ultrasonic signals within the preset time period may include both historical ultrasonic signals and, in some cases, the current ultrasonic signal.

[0084] The ultrasonic signal baseline is compared with a preset target value. If the difference between the ultrasonic signal baseline and the preset target value exceeds a first threshold range, that is, the absolute value of the difference between the ultrasonic signal baseline and the preset target value is greater than the first threshold, the ultrasonic signal baseline is far from the preset target value, and the processor 150 needs to readjust the ultrasonic drive circuit and / or the ultrasonic detection circuit. If the difference between the ultrasonic signal baseline and the preset target value does not exceed the first threshold range, that is, the absolute value of the difference between the ultrasonic signal baseline and the preset target value is less than the first threshold, the ultrasonic signal baseline is close to the preset target value, and the processor 150 can continue to collect ultrasonic signals using the current ultrasonic drive circuit parameters (current transmit frequency, current transmit frequency, and / or current drive gain value of the drive amplifier circuit) and ultrasonic detection circuit parameters (current detection gain value of the detection amplifier circuit), and perform bubble detection using the ultrasonic signal. The preset target value is related to the individual parameters of the ultrasonic sensor and is generally a preferred value (e.g., 2.5V-3V) obtained by the infusion pump manufacturer by testing the infusion tube with water before the infusion pump product is shipped. In some embodiments, the preset target value may be selected based on the type of the deployed infusion tube 40. For example, the memory 104 stores target values ​​corresponding to different types of infusion tubes 40. Thus, when the user selects a type of infusion tube 40 through the interface of the display screen 161, the processor 150 may retrieve the target value corresponding to the selected type of infusion tube 40 from the memory 104.

[0085] In some embodiments, when the processor 150 needs to readjust the ultrasonic driving circuit and / or the ultrasonic detection circuit, it can determine the adjustment information of the ultrasonic driving circuit by adjusting the ultrasonic driving circuit to adjust the emission frequency and / or emission intensity of the ultrasonic wave.

[0086] Please also refer to Figure 4 , which is a schematic diagram of the ultrasonic sensor transmitting and receiving ultrasonic signals in an embodiment of the present application. The ultrasonic transmitting end 231 of the ultrasonic sensor 230 can generate ultrasonic waves of different frequencies based on adjustable transmission parameter values ​​(including but not limited to transmission frequency, transmission intensity, etc.), and the ultrasonic receiving end 233 of the ultrasonic sensor 230 can receive ultrasonic waves that have penetrated the infusion tube 40 and generate corresponding ultrasonic signals. After ultrasonic waves of different transmission frequencies have penetrated the infusion tube 40, the output amplitudes of the ultrasonic signals obtained by the ultrasonic receiving end 233 may also be different. Figure 4 As shown, the ultrasonic drive circuit 149 can be based on the processor 150 (shown in Figure 5) instructions, the ultrasonic signal emitted by the ultrasonic transmitting end 231 is frequency modulated at different emission frequencies. For example, when the infusion tube 40 is full of water (i.e., the infusion tube does not contain any bubbles), in the first time period t1, an ultrasonic wave with a frequency of f1 is emitted, and an ultrasonic signal with an output amplitude of V1 is generated; in the second time period t2, an ultrasonic wave with a frequency of f2 is emitted, and an ultrasonic signal with an output amplitude of V2 is generated; in the third time period t3, an ultrasonic wave with a frequency of f3 is emitted, and an ultrasonic signal with an output amplitude of V3 is generated, wherein the emission frequency f1 is less than the emission frequency f2, and the emission frequency f2 is less than the emission frequency f3; the output amplitude V1 is less than the output amplitude V2, and the output amplitude V2 is less than the output amplitude V3.

[0087] In one embodiment, the ultrasonic sensor may not emit ultrasonic waves (or its transmission frequency may be 0) during the fourth time period t4. The processor 150 may test the performance of the ultrasonic sensor 230 of the infusion pump 20 based on the ultrasonic signal when the transmission frequency is 0 to determine whether the ultrasonic sensor 230 is in a normal operating state. If the transmission frequency of the ultrasonic sensor 230 is 0 and the output amplitude of the corresponding ultrasonic signal is also 0, the processor 150 may determine that the ultrasonic sensor 230 is in a normal operating state. If the transmission frequency of the ultrasonic sensor 230 is 0 and the output amplitude of the corresponding ultrasonic signal is not 0, the processor 150 may determine that the ultrasonic sensor 230 is in an abnormal operating state. In this case, a warning message indicating an abnormal ultrasonic sensor may be output.

[0088] If the ultrasonic signal baseline is less than the preset target value, the transmission frequency of the ultrasonic drive circuit should be increased; if the ultrasonic signal baseline is greater than the preset target value, the transmission frequency of the ultrasonic drive circuit should be reduced. Similarly, if the ultrasonic baseline is less than the preset target value, the transmission intensity of the ultrasonic drive circuit should be increased; if the ultrasonic signal baseline is greater than the preset target value, the transmission intensity of the ultrasonic drive circuit should be reduced. Similarly, when the ultrasonic baseline is less than the preset target value, the transmission intensity and transmission frequency of the ultrasonic drive circuit can be adjusted simultaneously to increase the output amplitude of the ultrasonic signal; when the ultrasonic signal baseline is greater than the preset target value, the transmission intensity and transmission frequency of the ultrasonic drive circuit can be adjusted simultaneously to reduce the output amplitude of the ultrasonic signal. Therefore, the adjusted transmission frequency and / or transmission intensity (target transmission frequency and / or target transmission intensity) can be used as adjustment information of the ultrasonic drive circuit, and the ultrasonic drive circuit can be adjusted.

[0089] In some embodiments, when the processor 150 needs to readjust the ultrasonic driving circuit and / or the ultrasonic detection circuit, it can determine the adjustment information of the ultrasonic driving circuit or the ultrasonic detection circuit by adjusting the ultrasonic detection circuit or the ultrasonic driving circuit to adjust the driving gain value of the driving amplifier circuit in the ultrasonic driving circuit or the detection gain value of the detection amplifier circuit in the ultrasonic detection circuit.

[0090] Taking the ultrasonic detection circuit as an example, the ultrasonic detection circuit 139 may include a detection amplifier circuit 137 and a filter circuit 135. The filter circuit 135 is used to filter the ultrasonic signal transmitted by the ultrasonic receiving end 233 of the ultrasonic sensor 230 and obtain the ultrasonic signal after the filtering process. The detection amplifier circuit 137 is used to amplify (or gain adjust) the ultrasonic signal after the filtering process, so that the processor 150 can obtain the ultrasonic signal after the amplification process. In this embodiment, the ultrasonic detection circuit 139 includes two or more detection amplifier circuits 137, each detection amplifier circuit has a corresponding gain, so that the ultrasonic detection circuit 139 has detection amplifier circuits with multiple gain values. The processor 150 can also select one, two, or more detection amplifier circuits 135 to amplify the ultrasonic signal.

[0091] If the ultrasonic signal baseline is less than the preset target value, the detection gain of the detection amplifier circuit should be increased; if the ultrasonic signal baseline is greater than the preset target value, the detection gain of the detection amplifier circuit should be decreased. Specifically, each ultrasonic detection circuit has a preset adjustable gain range, with the threshold values ​​at both ends being the maximum detection gain value and the minimum detection gain value. If the ultrasonic signal baseline is less than the preset target value, the current detection gain value and the maximum detection gain value can be dichotomized to obtain a new detection gain value (adjustment information), and the processor then adjusts the detection amplifier circuit based on this new detection gain value. If the ultrasonic signal baseline is greater than the preset target value, the current detection gain value and the minimum detection gain value can be dichotomized to obtain a target detection gain value (adjustment information), and the processor then adjusts the detection amplifier circuit based on this target detection gain value. Using the dichotomy method, the target detection gain value can be obtained relatively quickly, and the algorithm is simple and fast. Of course, other methods of increasing / decreasing the current detection gain value by a specific value (for example, by a preset adjustment value based on the detection gain value of the ultrasonic detection circuit) or gradually increasing / decreasing the current detection gain value are also suitable.

[0092] Taking an ultrasonic drive circuit as an example, the ultrasonic drive circuit may include a drive amplifier circuit. The drive amplifier circuit is used to amplify (or gain-adjust) ultrasonic waves before transmission. In this embodiment, the ultrasonic drive circuit includes two or more drive amplifier circuits, each having a corresponding gain. Thus, the ultrasonic drive circuit has amplifier circuits with multiple gain values. The processor may also select one, two, or more drive amplifier circuits to amplify the ultrasonic waves.

[0093] If the ultrasonic signal baseline is less than the preset target value, the drive gain value of the driver amplifier circuit should be increased; if the ultrasonic signal baseline is greater than the preset target value, the drive gain value of the driver amplifier circuit should be reduced. Specifically, each ultrasonic driver circuit has a preset adjustable gain range, with the threshold values ​​at both ends being the maximum drive gain value and the minimum drive gain value. If the ultrasonic signal baseline is less than the preset target value, the current drive gain value and the maximum drive gain value can be dichotomized to obtain a new drive gain value (adjustment information), and the processor then adjusts the drive amplifier circuit according to this new drive gain value. If the ultrasonic signal baseline is greater than the preset target value, the current drive gain value and the minimum drive gain value can be dichotomized to obtain a target drive gain value (adjustment information), and the processor then adjusts the drive amplifier circuit according to this target drive gain value. Using the dichotomy method, the target drive gain value can be obtained relatively quickly, and the algorithm is simple and fast. Of course, other methods of increasing / decreasing the current drive gain value or gradually increasing / decreasing the current drive gain value by a specific value (for example, by a preset adjustment value based on the drive gain value of the ultrasonic driver circuit) are also suitable.

[0094] In some embodiments, when the processor 150 needs to readjust the ultrasonic driving circuit and / or the ultrasonic detection circuit, it can determine the adjustment information of the ultrasonic driving circuit and / or the ultrasonic detection circuit by adjusting the ultrasonic driving circuit and the ultrasonic detection circuit at the same time according to the above two embodiments to adjust the transmission frequency, transmission intensity and / or driving gain value of the ultrasonic driving circuit, and adjust the detection gain value of the ultrasonic detection circuit.

[0095] In some embodiments, the adjustment information may also use preset adjustment values ​​to adjust the transmission frequency, transmission intensity, driving gain value of the ultrasonic driving circuit, and / or detection gain value of the ultrasonic detection circuit to a fixed value. That is, when the ultrasonic driving circuit and / or ultrasonic detection circuit need to be adjusted, if the transmission frequency needs to be adjusted, the preset adjustment value (a fixed value) set based on the transmission frequency is used as the adjustment information; if the transmission intensity needs to be adjusted, the preset adjustment value (a fixed value) set based on the transmission frequency is used as the adjustment information; if the amplifier circuit of the ultrasonic driving circuit needs to be adjusted, the preset adjustment value (a fixed value) set based on the amplifier circuit of the ultrasonic driving circuit is used as the adjustment information; if the amplifier circuit of the ultrasonic detection circuit needs to be adjusted, the preset adjustment value (a fixed value) based on the amplifier circuit of the ultrasonic detection circuit is used as the adjustment information. The processor may adjust at least one of the above adjustment values ​​as appropriate.

[0096] Step S106: Adjust the ultrasonic driving circuit and / or the ultrasonic detection circuit according to the adjustment information.

[0097] In one embodiment, the processor adjusts the ultrasonic drive circuit and / or the ultrasonic detection circuit accordingly based on the adjustment information (target transmission frequency, target transmission intensity, target drive gain value, and / or target detection gain value) obtained from the above embodiments. Specifically, the transmission frequency of the ultrasonic drive circuit, the transmission intensity of the ultrasonic drive circuit, the drive gain value of the ultrasonic drive circuit, and / or the detection gain value of the ultrasonic detection circuit can be adjusted based on the adjustment information.

[0098] For example, when the drive amplifier circuit or the detection amplifier circuit includes an amplifier circuit with an adjustable amplification factor, the processor can select the amplification factor corresponding to the target drive gain value or the target detection gain value by sending a signal. The drive amplifier circuit of the ultrasonic drive circuit or the detection amplifier circuit of the ultrasonic detection circuit can also include multiple amplifiers with different or the same amplification factors. The processor can trigger at least one amplifier by sending a signal to obtain an amplification factor that is suitable for the target drive gain value or the target detection gain value. For example, the processor can send a drive signal to the ultrasonic drive circuit to transmit ultrasonic waves at a target transmission frequency. For example, the processor can send a drive signal to the ultrasonic drive circuit to transmit ultrasonic waves at a target transmission intensity.

[0099] Step S108: Determine the state of the bubbles in the infusion tube according to the adjusted ultrasonic signal and the bubble threshold.

[0100] After adjusting the ultrasonic drive circuit and / or ultrasonic detection circuit, the processor compares the collected ultrasonic signal with the bubble threshold to determine the bubble status in the infusion tube. The bubble threshold can be a factory setting pre-set in the memory of the infusion pump.

[0101] In one embodiment, the difference between the collected ultrasonic signal and the preset target value after adjustment using the adjustment information is within a first threshold range, so that the change of the ultrasonic signal can be identified, which is conducive to ensuring accurate measurement of the bubble state of the infusion tube.

[0102] In some embodiments, the bubble threshold can also be adjusted based on ultrasound signals (including historical ultrasound signals and / or current ultrasound signals) over a preset time period. This allows the bubble threshold to be adjusted in real time based on the state of the ultrasound signal, thereby improving the accuracy of bubble detection. For example, the processor 150 determines an ultrasound signal baseline based on historical ultrasound signals and uses the determined ultrasound signal baseline as the bubble threshold. The bubble threshold and the ultrasound signal baseline have a linear functional relationship, such as the bubble threshold being A times the ultrasound signal baseline, where A is a real number greater than 0. In some embodiments, the bubble threshold and the ultrasound signal baseline can also have a nonlinear functional relationship, such as basic elementary functions such as exponential functions, power functions, logarithmic functions, and polynomial functions, as well as composite functions thereof. For example, the processor 150 may calculate the average of multiple historical ultrasound signals to determine the ultrasound signal baseline (i.e., A is 1) and use the determined ultrasound signal baseline as the bubble threshold, or use 90% of the average of the multiple historical ultrasound signals as the bubble threshold (i.e., A is 0.9). The multiple historical ultrasound signals may be continuously acquired by the processor 150 before the currently adjusted ultrasound signal is acquired. For example, if the processor 150 acquires the currently adjusted ultrasonic signal at time tn, and the number of historical ultrasonic signals is three, then the acquisition times corresponding to the multiple historical ultrasonic signals are tn-3, tn-2, and tn-1, respectively. In this embodiment, the processor 150 acquires multiple consecutive historical ultrasonic signals before acquiring the currently adjusted ultrasonic signal to timely update the ultrasonic signal baseline, which also helps improve the accuracy of subsequent bubble detection. In other embodiments, the bubble threshold can also be a fixed deviation value from the ultrasonic signal baseline. For example, if the ultrasonic signal baseline is B, the bubble threshold can be B+C or BC, where C is a fixed deviation value.

[0103] Ultrasonic waves emitted by the ultrasonic transmitter 231 of the ultrasonic sensor 230 pass through the infusion tube 40. When traversing the interface between two different media, ultrasonic waves undergo physical phenomena such as reflection, refraction, and transmission. Due to the significant difference in acoustic impedance between liquid and air, ultrasonic waves experience significant reflection and refraction when penetrating the liquid-air interface. Leveraging this physical phenomenon, the processor 150 receives the ultrasonic signal through the ultrasonic receiver 233 and obtains its output amplitude (output voltage), thereby monitoring the energy attenuation of the ultrasonic wave. Based on the degree of ultrasonic energy attenuation, the processor 150 can identify the presence and status of bubbles in the infusion tube.

[0104] Please also refer to Figures 8 to 10 , which are schematic diagrams of the morphology of each bubble type in the embodiment of the present application. The bubble type may include a first type of bubble (such as Figure 8 The large bubbles shown) and the second type of bubbles (such as Figure 9 or Figure 10 As shown in the tiny bubbles). Figure 8 As shown, when a large bubble appears in the infusion tube 40 and is within the detection range of the ultrasonic sensor (or bubble sensor), a nearly complete air column or a complete air column 41 will be formed within the detection range of the ultrasonic sensor. At this time, the ultrasonic wave will be greatly attenuated. The processor 150 can identify the large bubble by monitoring the output amplitude of the ultrasonic signal. The large bubble can be formed by a single bubble or by the aggregation of multiple bubbles. Figure 9 and Figure 10 As shown, when tiny bubbles appear in the infusion tube 40 and the tiny bubbles 43 and 45 are within the detection range of the ultrasonic sensor, there will be a part of gas and a part of liquid within the detection range of the ultrasonic sensor. The bubbles can exist freely in the liquid. Since ultrasonic waves have good penetrability for liquids, ultrasonic waves attenuate less than large bubbles. The processor 150 can identify tiny bubbles by monitoring ultrasonic signals.

[0105] When there are bubbles in the infusion tube 40, the ultrasonic signal obtained by the processor 150 will be smaller than the bubbles. Therefore, the processor 150 determines the bubble state in the infusion tube when it detects that the output amplitude of the currently adjusted ultrasonic signal is smaller than the ultrasonic signal baseline. Figures 8 to 10 Due to the different types of bubbles, the processor 150 determines that the output amplitude of the currently adjusted ultrasonic signal is also different. Therefore, the processor 150 can also determine the bubble status in the infusion tube 40 based on the output amplitude of the currently adjusted ultrasonic signal.

[0106] like Figure 13 As shown, when the infusion tube 40 is full of water, the output amplitude of the ultrasonic signal is a preset target value 60. The bubble threshold 61 is related to one or more of the infusion tube brand, material, diameter, type of infusion fluid, altitude, and environment. For example, the memory 104 may be configured with multiple sets of bubble threshold values. The processor 150 may retrieve the relevant bubble threshold value for calculation based on one or more of the infusion tube brand, material, diameter, altitude, and type of infusion fluid.

[0107] If the ultrasonic signal amplitude is less than the bubble threshold 61, it indicates that the ultrasonic wave has been significantly attenuated, and it can be determined that a large bubble exists in the infusion tube (e.g., ultrasonic signal 63). In this case, the bubble state in the infusion tube can be a first-type bubble state. If the ultrasonic signal output amplitude is greater than the bubble threshold 61, it indicates that the ultrasonic wave has been only slightly attenuated, and it can be determined that there are negligible tiny bubbles in the infusion tube, or even no bubbles exist (e.g., ultrasonic signal 64).

[0108] In some embodiments, as Figure 13 As shown, a second bubble threshold 62 may also be added to determine the ultrasonic signal between the bubble threshold 61 and the second bubble threshold 62, so as to make a more accurate judgment on bubble detection, such as a half-water and half-air state.

[0109] In one embodiment, after the processor identifies the presence of a large bubble, it can use the following formula:

[0110] V=v×d×t

[0111] Wherein, V is the volume of the large bubble; v is the flow rate per unit time of the infusion tube, which is generally set by the user according to the doctor's instructions; d is the diameter of the infusion tube; and t is the time it takes for the large bubble to pass through the detection range of the bubble sensor.

[0112] Step S110 : outputting bubble volume information and / or bubble alarm information according to the bubble state.

[0113] When the processor identifies that there is a large bubble in the infusion tube, the processor will calculate the volume of the large bubble and compare the volume of the large bubble with the bubble volume threshold preset in the memory. If the volume of the large bubble is greater than or equal to the bubble volume threshold, the processor controls the infusion pump to be in a liquid-stop state. For example, the processor 150 can stop the driving mechanism 208 to stop the pump plate group 204, and the pump plate group 204 stops squeezing the liquid in the infusion tube 40 to flow in the infusion direction; or the processor 150 can close the liquid-stop clamp so that the liquid-stop clamp clamps the wall of the infusion tube 40, so that the liquid in the infusion tube 40 stops flowing in the infusion direction. The processor can also issue prompt information related to large bubbles through the peripheral device interface. For example, the processor 150 can control the audio circuit 124 through the peripheral device interface 152 to issue an alarm audio to indicate the presence of large bubbles; or, the processor 150 can control the display controller 140 or the light controller 148 through the peripheral device interface 152 to display visual prompt information related to large bubbles on the display system 160 or the light component 168; or, the processor 150 can send prompt information related to large bubbles to other medical devices (such as monitors, docks) through the external port 122 to display visual prompt information about large bubbles on the display systems / light components of other medical devices; or, the processor 150 can send prompt information related to large bubbles to other medical devices (such as monitors, docks) through the external port 122 to issue an alarm audio in the audio circuit of the other medical device.

[0114] In addition, the processor counts the number of large bubbles that meet the requirement of a volume less than a bubble volume threshold, and the result of the count is reflected as a cumulative bubble volume. When the cumulative bubble volume exceeds a preset limit, for example, the processor 150 can control the audio circuit 124 via the peripheral device interface 152 to issue an audio alarm to indicate that the cumulative bubble volume has exceeded the limit; or the processor 150 can control the display controller 140 or the lighting controller 148 via the peripheral device interface 152 to display a visual prompt message indicating that the cumulative bubble volume has exceeded the limit on the display system 160 or the lighting assembly 168; or the processor 150 can send the prompt message indicating that the cumulative bubble volume has exceeded the limit to other medical devices (e.g., a monitor, a dock) via the external port 122, so that the visual prompt message indicating that the cumulative bubble volume has exceeded the limit is displayed on the display system / light assembly of the other medical devices; or the processor 150 can send the prompt message indicating that the cumulative bubble volume has exceeded the limit to other medical devices (e.g., a monitor, a dock) via the external port 122, so that the audio circuit of the other medical devices issues an audio alarm.

[0115] When the accumulated bubble volume does not exceed the preset limit, the processor controls the infusion pump to be in the infusion state. For example, the processor 150 maintains the driving mechanism to drive the pump plate group 204 to be in motion, and the pump plate group 204 squeezes the liquid in the infusion tube 40 to flow in the infusion direction; at the same time, the processor 150 controls the display controller 140 through the peripheral device interface 152 to display the current accumulated bubble volume on the display system 160; or, the processor 150 can send the current accumulated bubble volume to other medical devices (such as monitors, docks) through the external port 122 to display the current accumulated bubble volume on the display system / lighting component of other medical devices.

[0116] When the processor identifies the presence of tiny bubbles in the infusion tube, the processor controls the infusion pump to be in an infusion state. For example, the processor 150 maintains the driving mechanism, driving the pump plate group 204 to be in motion, and the pump plate group 204 squeezes the liquid in the infusion tube 40 to flow in the infusion direction.

[0117] The above-mentioned infusion pump bubble detection method determines whether there is a possibility that the bubble detection may be affected by the different diameters of the infusion tube by comparing the ultrasonic signal obtained during the infusion process with the preset target value. When the ultrasonic signal deviates from the preset target value to a certain extent, the ultrasonic driving circuit and / or the ultrasonic detection circuit are adjusted so that the ultrasonic signal received after the adjustment is near the preset target value, so that the ultrasonic signal corresponds to the diameter of the infusion tube, thereby realizing adaptive control of the ultrasonic signal and effectively solving the problems of missed detection and false detection of bubbles caused by different diameters of the infusion tube.

[0118] In some embodiments, as Figure 14 As shown, before the processor starts the infusion, the processor performs the following steps:

[0119] Step S200: Control the ultrasonic driving circuit to transmit ultrasonic waves at an initial transmitting frequency, initial transmitting intensity, and initial driving gain value.

[0120] Step S202: Receive an ultrasonic signal corresponding to an ultrasonic wave and processed by an ultrasonic detection circuit with an initial detection gain value.

[0121] The processor receives the ultrasonic signal obtained by the ultrasonic receiving end after the ultrasonic wave passes through the infusion tube and attenuates, and then amplifies and filters the ultrasonic signal with the initial detection gain value through the ultrasonic detection circuit.

[0122] Step S204: If it is determined that the difference between the output amplitude of the ultrasonic signal and the preset target value is within the second threshold range, the infusion operation is started.

[0123] The processor then determines whether the ultrasonic signal and a preset target value are within a second threshold range. If the ultrasonic signal and the preset target value are within the second threshold range, that is, the absolute value of the difference between the ultrasonic signal and the target value is less than the second threshold (a positive number), the infusion pump is ready to start infusion and can start infusion at any time according to user instructions and online activation instructions from related devices. The second threshold can be the same as the first threshold, or in some embodiments, they can be slightly different.

[0124] Step S206: If it is determined that the difference between the output amplitude of the ultrasonic signal and the preset target value exceeds the second threshold range, the adjustment information of the ultrasonic driving circuit and / or the ultrasonic detection circuit is determined based on at least one of the initial driving gain value, the initial detection gain value, the initial transmission frequency and the initial transmission intensity.

[0125] If the processor determines that the difference between the ultrasonic signal and the preset target value exceeds the second threshold range, that is, the absolute value of the difference between the ultrasonic signal and the target value is greater than the second threshold, this indicates that the bubble detection of the infusion pump may have deviated. The processor needs to adjust at least one of the initial drive gain value, the initial detection gain value, the initial transmission frequency and the initial transmission intensity, so that the ultrasonic drive circuit and / or the ultrasonic control circuit can make the adjusted ultrasonic signal within the ideal amplitude range, so that the change of the ultrasonic signal is within a recognizable range.

[0126] During the initial drive gain adjustment process, in some embodiments, the processor may use the average of the initial drive gain and the maximum drive gain as adjustment information to adjust the ultrasonic drive circuit. This approach is suitable for situations where the ultrasonic signal is less than a preset target value, and uses a binary search method to determine at least one piece of adjustment information, resulting in a simple and efficient algorithm. In some embodiments, the processor may use the average of the initial drive gain and the minimum drive gain as at least one piece of adjustment information to adjust the ultrasonic drive circuit. This approach is suitable for situations where the ultrasonic signal is greater than the preset target value, and similarly uses a binary search method to determine the adjustment information, resulting in a highly efficient and convenient algorithm.

[0127] During the initial detection gain adjustment process, in some embodiments, the processor may use the average of the initial detection gain and the maximum detection gain as adjustment information to adjust the ultrasonic detection circuit. This approach is suitable for situations where the ultrasonic signal is less than a preset target value, and uses a binary search method to determine at least one piece of adjustment information, resulting in a simple and efficient algorithm. In some embodiments, the processor may use the average of the initial detection gain and the minimum detection gain as at least one piece of adjustment information to adjust the ultrasonic detection circuit. This approach is suitable for situations where the ultrasonic signal is greater than the preset target value, and similarly uses a binary search method to determine the adjustment information, resulting in a highly efficient and convenient algorithm.

[0128] If the output amplitude of the ultrasonic signal is greater than the preset target value, it indicates that an amplifier circuit with a smaller gain than the initial gain value needs to be selected. In this case, the processor 150 may determine the target detection gain value (i.e., the adjustment parameter includes the target detection gain value) based on the minimum detection gain value (e.g., p1) and the current detection gain value (e.g., p0), such as determining the target detection gain value to be (p1+p0) / 2. Similarly, if the output amplitude of the ultrasonic signal is less than the preset target value, it indicates that an amplifier circuit with a larger gain than the initial detection gain value needs to be selected. In this case, the processor 150 may determine the target detection gain value based on the maximum detection gain value (e.g., p2) and the initial detection gain value, such as determining the target detection gain value to be (p2+p0) / 2.

[0129] In one embodiment, taking the adjustment process of the detection gain value as an example, if the absolute value of the difference between the output amplitude of the ultrasonic signal and the preset target value exceeds the second threshold, the processor 150 may determine the target detection gain value as adjustment information based on a preset interval (preset adjustment value, such as p3). For example, if the output amplitude of the ultrasonic signal is greater than the preset target value, the processor 150 may determine the target detection gain value based on the preset interval and the preset detection gain value, such as determining the target detection gain value to be (p0-p3). Similarly, if the output amplitude of the ultrasonic signal is less than the preset target value, the processor 150 may determine the target detection gain value based on the preset interval and the current detection gain value, such as determining the target detection gain value to be (p0+p3). In one embodiment, the adjustment of the drive gain value may also be the same as the detection gain value, and the initial drive gain value may be adjusted with a preset adjustment value based on the gain value of the ultrasonic drive circuit to determine the target gain value.

[0130] During the adjustment of the initial transmission frequency, the target transmission frequency can be obtained by binary calculation as at least one of the adjustment information, just like adjusting the initial detection gain value; the initial transmission frequency can also be gradually adjusted and detected at preset frequency intervals to ultimately determine the ultrasonic signal that can be output that is closest to the preset target value.

[0131] During the adjustment process of the initial emission intensity, the target emission intensity can be obtained by dichotomy calculation as at least one of the adjustment information, just like adjusting the initial detection gain value; the initial emission intensity can also be gradually adjusted and detected at a preset intensity interval (preset adjustment value) to ultimately determine the ultrasonic signal that can be output that is closest to the preset target value.

[0132] Step S208: Adjust the ultrasonic driving circuit and / or the ultrasonic detection circuit according to the adjustment information.

[0133] After the processor obtains the adjustment information according to the above method, it adjusts the ultrasonic drive circuit and / or ultrasonic detection circuit accordingly based on the content to be adjusted. Specifically, during the above-mentioned adjustment of the detection gain value, if the processor determines that the target detection gain value obtained exceeds the maximum detection gain value or is less than the minimum detection gain value, it indicates that the infusion tube is installed incorrectly. At this time, the processor needs to issue an alarm message to prompt the user to check and take action. If the target detection gain value obtained is greater than the minimum detection gain value and less than the maximum detection gain value, the processor can adjust the ultrasonic detection circuit according to the target detection gain value.

[0134] The above-mentioned infusion pump bubble detection method can detect in advance whether the ultrasonic drive circuit and / or ultrasonic control circuit can be adapted to the infusion tube through ultrasound before starting the infusion. This can detect and solve problems in advance, allowing the ultrasonic drive circuit and ultrasonic control circuit to adapt to the infusion tube consumables and obtain an ideal ultrasonic signal. Moreover, during the infusion, by monitoring the relationship between the ultrasonic signal and the preset target value, the ultrasonic drive circuit and / or ultrasonic control circuit are adjusted in real time to ensure that the ultrasonic signal during the infusion process is within the ideal amplitude range, thereby avoiding missed detection and false detection of bubbles. In addition, during the infusion process, adjustments can be made based on the real-time ultrasonic signal and the bubble threshold to make bubble detection more accurate.

[0135] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0136] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0137] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0138] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0139] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An infusion pump, characterized in that: The infusion pump is used in conjunction with an infusion tube, and the infusion pump includes a peristaltic extrusion mechanism, a processor and a plurality of ultrasonic sensor assemblies, each of the plurality of ultrasonic sensor assemblies including an ultrasonic sensor transmitting end, an ultrasonic sensor receiving end, an ultrasonic driving circuit and an ultrasonic detection circuit; the peristaltic extrusion mechanism includes a driving mechanism and a pump sheet group; the processor is connected to the ultrasonic sensor transmitting end through the ultrasonic driving circuit to control the ultrasonic sensor transmitting end to transmit ultrasonic waves, the processor is connected to the ultrasonic sensor receiving end through the ultrasonic detection circuit to receive an ultrasonic signal collected by the ultrasonic sensor receiving end and formed by signal processing by the ultrasonic detection circuit, and the driving mechanism, under the control of the processor, drives the pump sheet group to squeeze the infusion tube arranged along the infusion tube groove of the infusion pump, so that the liquid in the infusion tube moves in a preset direction; The processor is used to emit ultrasonic waves and collect corresponding ultrasonic signals after the infusion pump is powered on, retrieve the ultrasonic signals within a preset time period in the ultrasonic signals, and determine the ultrasonic signal baseline based on the ultrasonic signals within the preset time period. The processor is also used to retrieve the preset target value corresponding to the type of infusion tube selected by the user, and is also used to determine the adjustment information of the ultrasonic drive circuit and / or the ultrasonic detection circuit if the difference between the ultrasonic signal baseline and the preset target value exceeds a first threshold range, adjust the ultrasonic drive circuit and / or the ultrasonic detection circuit according to the adjustment information, determine the bubble state in the infusion tube according to the ultrasonic signal collected after the adjustment and the bubble threshold, and output the bubble volume information and / or bubble alarm information according to the bubble state.

2. The infusion pump according to claim 1, characterized in that: The processor is used to transmit ultrasonic waves and collect corresponding ultrasonic signals after the infusion pump is powered on and after the infusion operation is started or the installation of the infusion tube is recognized.

3. The infusion pump according to claim 1, characterized in that: The processor is also used to adjust the transmission frequency of the ultrasonic drive circuit, the transmission intensity of the ultrasonic drive circuit, the driving gain value of the ultrasonic drive circuit and / or the detection gain value of the ultrasonic detection circuit according to the adjustment information.

4. The infusion pump according to claim 3, characterized in that: The difference between the ultrasonic signal collected after the adjustment and the preset target value is within a first threshold range.

5. The infusion pump according to claim 3 or 4, characterized in that: The adjustment information includes at least one of a preset adjustment value based on the emission frequency of the ultrasonic driving circuit, a preset adjustment value based on the emission intensity of the ultrasonic driving circuit, a preset adjustment value based on the driving gain value of the ultrasonic driving circuit, and a preset adjustment value based on the detection gain value of the ultrasonic detection circuit.

6. The infusion pump according to claim 1 or 3, characterized in that: The processor is also used to determine adjustment information of the ultrasonic drive circuit and / or the ultrasonic detection circuit based on at least one of the current transmission frequency of the ultrasonic drive circuit, the current transmission intensity of the ultrasonic drive circuit, the current driving gain value of the ultrasonic drive circuit and the current detection gain value of the ultrasonic detection circuit.

7. The infusion pump according to claim 6, characterized in that: The ultrasonic detection circuit includes a detection amplifier circuit, the ultrasonic drive circuit includes a drive amplifier circuit, the adjustment information includes a target detection gain value of the detection amplifier circuit and / or a target driving gain value of the drive amplifier circuit, and the processor is used to determine a target detection gain value or a target driving gain value based on a current detection gain value of the detection amplifier circuit and / or a current driving gain value of the drive amplifier circuit, and adjust the detection amplifier circuit and / or the drive amplifier circuit based on the target detection gain value or the target driving gain value.

8. The infusion pump according to claim 6, characterized in that: The adjustment information includes the target emission frequency and / or target emission intensity of the ultrasonic drive circuit, and the processor is used to determine the target emission frequency and / or target emission intensity accordingly according to the current emission frequency and / or current emission intensity of the ultrasonic drive circuit, and adjust the ultrasonic drive circuit according to the target emission frequency and / or target emission intensity.

9. The infusion pump according to claim 7, characterized in that: The processor is used to determine a target drive gain value according to the current drive gain value and a preset minimum drive gain value, or to determine the target detection gain value according to the current detection gain value and a preset minimum detection gain value if the ultrasonic signal baseline is greater than the preset target value; Alternatively, if the ultrasonic signal baseline is less than the preset target value, the target driving gain value is determined according to the current driving gain value and the preset maximum driving gain value, or the target detection gain value is determined according to the current detection gain value and the preset maximum detection gain value.

10. The infusion pump according to claim 1, characterized in that: The processor is further configured to determine the bubble threshold according to the ultrasound signal baseline, and the bubble threshold is in a linear functional relationship with the ultrasound signal baseline.

11. The infusion pump according to claim 1 or 2, characterized in that: The processor is also used to control the ultrasonic drive circuit to transmit ultrasonic waves at an initial transmission frequency, initial transmission intensity and initial drive gain value before starting the infusion, and receive an ultrasonic signal corresponding to the ultrasonic wave and processed by the ultrasonic detection circuit with an initial detection gain value, and if it is determined that the difference between the output amplitude of the ultrasonic signal and the preset target value is within a second threshold range, the infusion operation is started.

12. The infusion pump according to claim 11, characterized in that: The processor is also used to determine adjustment information of the ultrasonic drive circuit and / or the ultrasonic detection circuit if it is determined that the difference between the output amplitude of the ultrasonic signal and a preset target value exceeds the second threshold range, and adjust the ultrasonic drive circuit and / or the ultrasonic detection circuit according to the adjustment information.

13. The infusion pump according to claim 12, characterized in that: The adjustment information includes at least one of a preset adjustment value based on the emission frequency of the ultrasonic drive circuit, a preset adjustment value based on the emission intensity of the ultrasonic drive circuit, a preset adjustment value based on the driving gain value of the ultrasonic drive circuit, and a preset adjustment value based on the detection gain value of the ultrasonic detection circuit; or The adjustment information is determined according to at least one of the initial driving gain value, the initial detection gain value, the initial transmission frequency, and the initial transmission intensity.

14. The infusion pump according to claim 12, characterized in that: The processor is also used to determine the target driving gain value of the driving amplifier circuit in the ultrasonic driving circuit according to the initial driving gain value and the maximum driving gain value, or determine the target detection gain value of the detection amplifier circuit in the ultrasonic detection circuit according to the initial detection gain value and the maximum detection gain value if it is determined that the output amplitude of the ultrasonic signal is less than the preset target value, and adjust the driving amplifier circuit or the detection amplifier circuit according to the target driving gain value or the target detection gain value.

15. The infusion pump according to claim 14, characterized in that: The processor is used to output alarm information about the infusion tube if it is determined that the target drive gain value is greater than the maximum drive gain value or less than the minimum drive gain value, or the target detection gain value is greater than the maximum detection gain value or less than the minimum detection gain value; if it is determined that the target drive gain value is less than the maximum drive gain value and greater than the minimum drive gain value, or the target detection gain value is less than the maximum drive gain value and greater than the minimum drive gain value, then adjust the drive amplifier circuit or the detection amplifier circuit according to the target drive gain value or the target detection gain value.

16. A method for detecting bubbles in an infusion pump, characterized in that: The method is applied to an infusion pump, which is used in conjunction with an infusion tube. The infusion pump includes a peristaltic extrusion mechanism, a processor and a plurality of ultrasonic sensor assemblies, each of which includes an ultrasonic sensor transmitting end, an ultrasonic sensor receiving end, an ultrasonic driving circuit and an ultrasonic detection circuit; the peristaltic extrusion mechanism includes a driving mechanism and a pump sheet group; the processor is connected to the ultrasonic sensor transmitting end through the ultrasonic driving circuit to control the ultrasonic sensor transmitting end to transmit ultrasonic waves, and the processor is connected to the ultrasonic sensor receiving end through the ultrasonic detection circuit to receive an ultrasonic signal collected by the ultrasonic sensor receiving end and formed by signal processing by the ultrasonic detection circuit; under the control of the processor, the driving mechanism drives the pump sheet group to squeeze the infusion tube arranged along the infusion tube groove of the infusion pump, so that the liquid in the infusion tube moves in a preset direction, and the method includes: The infusion pump is powered on; Transmitting ultrasonic waves and collecting corresponding ultrasonic signals; Retrieving ultrasonic signals within a preset time period from the ultrasonic signals; Determining an ultrasonic signal baseline according to the ultrasonic signal within the preset time period; Retrieving a preset target value corresponding to the type of the infusion tube selected by the user, and if the difference between the ultrasonic signal baseline and the preset target value exceeds a first threshold range, determining adjustment information of the ultrasonic driving circuit and / or the ultrasonic detection circuit; adjusting the ultrasonic driving circuit and / or the ultrasonic detection circuit according to the adjustment information; Determining the state of bubbles in the infusion tube according to the collected ultrasonic signal and the bubble threshold after adjustment; The volume information of the bubble and / or the bubble alarm information are output according to the bubble state.

17. The infusion pump bubble detection method according to claim 16, characterized in that: The ultrasonic wave is emitted and the corresponding ultrasonic signal is collected after the infusion pump is powered on and after the infusion work is started or the infusion tube installation is identified.

18. The method for detecting bubbles in an infusion pump according to claim 16, characterized in that: The method further comprises: The transmission frequency of the ultrasonic driving circuit, the transmission intensity of the ultrasonic driving circuit, the driving gain value of the ultrasonic driving circuit and / or the detection gain value of the ultrasonic detection circuit are adjusted according to the adjustment information.

19. The infusion pump bubble detection method according to claim 18, characterized in that: The difference between the ultrasonic signal collected after the adjustment and the preset target value is within a first threshold range.

20. The infusion pump bubble detection method according to claim 18 or 19, characterized in that: The determining of adjustment information of the ultrasonic driving circuit and / or the ultrasonic detection circuit includes: Adjustment information of the ultrasonic driving circuit and / or ultrasonic detection circuit is determined based on at least one of a preset adjustment value of the transmission frequency of the ultrasonic driving circuit, a preset adjustment value of the transmission intensity of the ultrasonic driving circuit, a preset adjustment value of the driving gain value of the ultrasonic driving circuit, and a preset adjustment value of the detection gain value of the ultrasonic detection circuit.

21. The infusion pump bubble detection method according to claim 18 or 19, characterized in that: The determining of adjustment information of the ultrasonic driving circuit and / or the ultrasonic detection circuit includes: If the difference between the ultrasonic signal baseline and the preset target value exceeds a first threshold range, the adjustment information of the ultrasonic drive circuit and / or the ultrasonic detection circuit is determined based on at least one of the current transmission frequency of the ultrasonic drive circuit, the current transmission intensity of the ultrasonic drive circuit, the current driving gain value of the ultrasonic drive circuit and the current detection gain value of the ultrasonic detection circuit.

22. The infusion pump bubble detection method according to claim 21, characterized in that: The ultrasonic driving circuit includes a driving amplifier circuit, the ultrasonic detection circuit includes a detection amplifier circuit, the adjustment information includes a target driving gain value of the driving amplifier circuit or a target detection gain value of the detection amplifier circuit, and the determining the adjustment information of the ultrasonic driving circuit and / or the ultrasonic detection circuit, and adjusting the ultrasonic driving circuit and / or the ultrasonic detection circuit according to the adjustment information, includes: Determining a target driving gain value of the driving amplifier circuit according to a current driving gain value of the driving amplifier circuit, or determining a target detection gain value of the detection amplifier circuit according to a current detection gain value of the detection amplifier circuit; The drive amplifier circuit or the detection amplifier circuit is adjusted according to the target drive gain value or the target detection gain value.

23. The infusion pump bubble detection method according to claim 21, characterized in that: The adjustment information also includes a target emission frequency and / or a target emission intensity of the ultrasonic drive circuit. The determining the adjustment information of the ultrasonic drive circuit and / or the ultrasonic detection circuit and adjusting the ultrasonic drive circuit and / or the ultrasonic detection circuit according to the adjustment information includes: According to the current transmission frequency and / or current transmission intensity of the ultrasonic drive circuit, a target transmission frequency and / or a target transmission intensity is correspondingly determined; The ultrasonic drive circuit is adjusted according to the target transmission frequency and / or the target transmission intensity.

24. The infusion pump bubble detection method according to claim 22, characterized in that: The determining of a target driving gain value of the driving amplifier circuit according to a current driving gain value of the driving amplifier circuit, or the determining of a target detection gain value of the detection amplifier circuit according to a current detection gain value of the detection amplifier circuit, comprises: If the ultrasonic signal baseline is greater than the preset target value, the target driving gain value is determined according to the current driving gain value of the driving amplifier circuit and the preset minimum driving gain value, or the target detection gain value is determined according to the current monitoring gain value of the detection amplifier circuit and the preset minimum detection gain value; or, If the ultrasonic signal baseline is less than the preset target value, the target driving gain value is determined according to the current driving gain value of the driving amplifier circuit and the preset maximum driving gain value, or the target detection gain value is determined according to the current detection gain value of the detection amplifier circuit and the preset maximum detection gain value.

25. The infusion pump bubble detection method according to claim 16, characterized in that: Also includes: The bubble threshold is determined according to the ultrasound signal baseline, and the bubble threshold is in a linear functional relationship with the ultrasound signal baseline.

26. The infusion pump bubble detection method according to claim 17, characterized in that: Before starting the infusion process, the method further includes: Controlling the ultrasonic drive circuit to transmit ultrasonic waves at an initial transmission frequency, an initial transmission intensity and an initial driving gain; receiving an ultrasonic signal corresponding to the ultrasonic wave and processed by the ultrasonic detection circuit with an initial detection gain value; If it is determined that the difference between the ultrasonic signal and the preset target value is within a second threshold range, the infusion operation is started.

27. The infusion pump bubble detection method according to claim 26, characterized in that: Also includes: If it is determined that the difference between the output amplitude of the ultrasonic signal and the preset target value exceeds the second threshold range, determining adjustment information of the ultrasonic drive circuit and / or the ultrasonic detection circuit according to at least one of the initial drive gain value, the initial detection gain value, the initial transmission frequency and the initial transmission intensity; The ultrasonic driving circuit and / or the ultrasonic detection circuit are adjusted according to the adjustment information.

28. The infusion pump bubble detection method according to claim 26, characterized in that: The step of determining adjustment information of the ultrasonic drive circuit and / or the ultrasonic detection circuit according to at least one of the initial drive gain value, the initial detection gain value, the initial transmission frequency, and the initial transmission intensity, and adjusting the ultrasonic drive circuit and / or the ultrasonic detection circuit according to the adjustment information comprises: If the output amplitude of the ultrasonic signal is greater than the preset target value, the target driving gain value of the driving amplifier circuit of the ultrasonic driving circuit is determined according to the initial driving gain value and the minimum driving gain value, or the target detection gain value of the detection amplifier circuit in the ultrasonic detection circuit is determined according to the initial detection gain value and the minimum detection gain value, and the driving amplifier circuit or the detection amplifier circuit is adjusted according to the target driving gain value or the target detection gain value; or If it is determined that the output amplitude of the ultrasonic signal is less than the preset target value, the target driving gain value of the driving amplifier circuit of the ultrasonic driving circuit is determined according to the initial driving gain value and the maximum driving gain value, or the target detection gain value of the detection amplifier circuit in the ultrasonic detection circuit is determined according to the initial detection gain value and the maximum detection gain value, and the driving amplifier circuit or the detection amplifier circuit is adjusted according to the target driving gain value or the target detection gain value.

29. The infusion pump bubble detection method according to claim 28, characterized in that: The adjusting the ultrasonic detection circuit according to the target drive gain value or the target detection gain value comprises: If it is determined that the target drive gain value is greater than the maximum drive gain value or less than the minimum drive gain value, output alarm information about the infusion tube; if it is determined that the target drive gain value is less than the maximum drive gain value and greater than the minimum drive gain value, adjust the ultrasonic detection circuit according to the target drive gain value; or If it is determined that the target detection gain value is greater than the maximum detection gain value or less than the minimum detection gain value, an alarm message about the infusion tube is output; if it is determined that the target detection gain value is less than the maximum detection gain value and greater than the minimum detection gain value, the ultrasonic detection circuit is adjusted according to the target detection gain value.

30. The method for detecting bubbles in an infusion pump according to claim 16, characterized in that: Also includes: The bubble threshold is determined according to the ultrasound signal baseline, and the bubble threshold is in a nonlinear functional relationship with the ultrasound signal baseline.

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